prosody
1bcc8ca57a7c
core/loggingmanager.lua

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core/loggingmanager.lua @ 1024:1bcc8ca57a7c

core.loggingmanager: Add default logging settings (to console) and fill out code for adding sinks which catch all sources
author Matthew Wild <mwild1@gmail.com>
date Tue, 21 Apr 2009 21:10:42 +0100
parent 1021:f9122efeaadd
child 1031:ec013f93de81
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1
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2 local format, rep = string.format, string.rep;
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3 local io_write = io.write;
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4 local pcall = pcall;
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5 local debug = debug;
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6 local tostring = tostring;
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7 local math_max = math.max;
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8
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9 local logger = require "util.logger";
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11 local default_logging = { { to = "console" } };
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12
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13 -- Global log function, because some people are too
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14 -- lazy to get their own...
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15 _G.log = logger.init("general");
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16
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17 local log_sink_types = {};
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18 local get_levels;
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19 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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21 --- Main function to read config, create the appropriate sinks and tell logger module
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22 function setup_logging(log)
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23 log = log or config.get("*", "core", "log") or default_logging;
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24 -- Set default logger
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25 if type(log) == "string" then
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26 if not log:match("^%*") then
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27 end
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28 elseif type(log) == "table" then
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29 -- Advanced configuration chosen
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30 for i, sink_config in ipairs(log) do
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31 local sink_maker = log_sink_types[sink_config.to];
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32 if sink_maker then
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33 if sink_config.levels and not sink_config.source then
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34 -- Create sink
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35 local sink = sink_maker(sink_config);
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36
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37 -- Set sink for all chosen levels
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38 for level in pairs(get_levels(sink_config.levels)) do
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39 logger.add_level_sink(level, sink);
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40 end
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41 elseif sink_config.source and not sink_config.levels then
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42 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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43 elseif sink_config.source and sink_config.levels then
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44 local levels = get_levels(sink_config.levels);
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45 local sink = sink_maker(sink_config);
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46 logger.add_name_sink(sink_config.source,
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47 function (name, level, ...)
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48 if levels[level] then
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49 return sink(name, level, ...);
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50 end
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51 end);
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52 else
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53 -- All sources
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54 -- Create sink
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55 local sink = sink_maker(sink_config);
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56
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57 -- Set sink for all levels
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58 for _, level in pairs(logging_levels) do
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59 logger.add_level_sink(level, sink);
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60 end
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61 end
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62 else
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63 -- No such sink type
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64 end
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65 end
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66 end
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67 end
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68
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69 --- Definition of built-in logging sinks ---
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70 local math_max, rep = math.max, string.rep;
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71
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72 -- Column width for "source" (used by stdout and console)
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73
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74 function log_sink_types.nowhere()
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75 return function () return false; end;
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76 end
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77
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78 local sourcewidth = 20;
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79
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80 function log_sink_types.stdout()
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81 return function (name, level, message, ...)
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82 sourcewidth = math_max(#name+2, sourcewidth);
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83 local namelen = #name;
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84 if ... then
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85 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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86 else
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87 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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88 end
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89 end
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90 end
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91
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92 do
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93 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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94 local do_pretty_printing = not os.getenv("WINDIR");
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95
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96 local logstyles = {};
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97 if do_pretty_printing then
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98 logstyles["info"] = getstyle("bold");
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99 logstyles["warn"] = getstyle("bold", "yellow");
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100 logstyles["error"] = getstyle("bold", "red");
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101 end
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102 function log_sink_types.console(config)
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103 -- Really if we don't want pretty colours then just use plain stdout
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104 if not do_pretty_printing then
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105 return log_sink_types.stdout(config);
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106 end
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107
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108 return function (name, level, message, ...)
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109 sourcewidth = math_max(#name+2, sourcewidth);
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110 local namelen = #name;
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111 if ... then
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112 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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113 else
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114 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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115 end
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116 end
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117 end
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118 end
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119
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120 function log_sink_types.file(config)
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121 local log = config.filename;
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122 local logfile = io.open(log, "a+");
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123 if not logfile then
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124 return function () end
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125 end
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126
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127 local write, format, flush = logfile.write, string.format, logfile.flush;
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128 return function (name, level, message, ...)
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129 if ... then
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130 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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131 else
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132 write(logfile, name, "\t" , level, "\t", message, "\n");
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133 end
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134 flush(logfile);
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135 end;
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136 end
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137
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138 function log_sink_types.syslog()
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139 end
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140
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141 --- Helper function to get a set of levels given a "criteria" table
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142 function get_levels(criteria, set)
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143 set = set or {};
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144 if type(criteria) == "string" then
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145 set[criteria] = true;
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146 return set;
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147 end
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148 local min, max = criteria.min, criteria.max;
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149 if min or max then
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150 local in_range;
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151 for _, level in ipairs(logging_levels) do
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152 if min == level then
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153 set[level] = true;
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154 in_range = true;
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155 elseif max == level then
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156 set[level] = true;
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157 return set;
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158 elseif in_range then
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159 set[level] = true;
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160 end
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161 end
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162 end
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163
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164 for _, level in ipairs(criteria) do
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165 set[level] = true;
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166 end
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167 return set;
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168 end
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169
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170 --- Set up logging
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171 setup_logging();
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172